/Engine/Source/Runtime/Engine/Classes/Animation/AnimCompress_RemoveTrivialKeys.h
Removes trivial frames  frames of tracks when position or orientation is constant over the entire animation  from the raw animation data. If both position and rotation go down to a single frame, the time is stripped out as well.
class UAnimCompress_RemoveTrivialKeys : public [UAnimCompress](API\Runtime\Engine\Animation\UAnimCompress)
float
MaxAngleDiff
float
MaxPosDiff
float
MaxScaleDiff